EP1769155B1 - Turbine rotor disk with reduced leakage of servo oil - Google Patents

Turbine rotor disk with reduced leakage of servo oil Download PDF

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Publication number
EP1769155B1
EP1769155B1 EP05752597A EP05752597A EP1769155B1 EP 1769155 B1 EP1769155 B1 EP 1769155B1 EP 05752597 A EP05752597 A EP 05752597A EP 05752597 A EP05752597 A EP 05752597A EP 1769155 B1 EP1769155 B1 EP 1769155B1
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EP
European Patent Office
Prior art keywords
delivery pipe
turbine
leakage
piston rod
rotor disk
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP05752597A
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German (de)
French (fr)
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EP1769155A1 (en
Inventor
Carsten Diedrich Herrmann
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Andritz Hydro GmbH Austria
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Andritz Hydro GmbH Austria
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Publication of EP1769155A1 publication Critical patent/EP1769155A1/en
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Publication of EP1769155B1 publication Critical patent/EP1769155B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
    • F03B3/04—Machines or engines of reaction type; Parts or details peculiar thereto with substantially axial flow throughout rotors, e.g. propeller turbines
    • F03B3/06—Machines or engines of reaction type; Parts or details peculiar thereto with substantially axial flow throughout rotors, e.g. propeller turbines with adjustable blades, e.g. Kaplan turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
    • F03B11/006—Sealing arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F03B13/10—Submerged units incorporating electric generators or motors
    • F03B13/105—Bulb groups
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
    • F03B3/12—Blades; Blade-carrying rotors
    • F03B3/14—Rotors having adjustable blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
    • F03B3/12—Blades; Blade-carrying rotors
    • F03B3/14—Rotors having adjustable blades
    • F03B3/145—Mechanisms for adjusting the blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/60—Fluid transfer
    • F05B2260/602—Drainage
    • F05B2260/603—Drainage of leakage having past a seal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
    • F05B2260/76—Adjusting of angle of incidence or attack of rotating blades the adjusting mechanism using auxiliary power sources
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

Definitions

  • the subject invention relates to a Kaplan type turbine impeller with adjustable impeller blades, wherein the impeller blades are adjustable by an oil operated servomotor disposed on a piston rod within the impeller hub.
  • a turbine runner according to the preamble of claim 1 is made DE 1 772 000 known.
  • Using oil-driven servomotors to adjust the impeller blades also results in leakage losses of servo oil from the servomotor. Due to increasing environmental regulations, it must be prevented that the leakage losses of servo oil get into the medium flowing around the turbine.
  • the present invention is therefore an object of the invention to provide a turbine wheel with which is prevented in a simple and effective manner that leakage from the servo motor can escape into the medium flowing around the turbine.
  • a collecting container is provided in which the oil emerging between the piston rod and a seal of the servomotor is collected, the collecting container is arranged around the free end of the piston rod and rigidly connected to the servo motor and is moved with this ,
  • a delivery line is provided and one end of this delivery line opens into a pump chamber formed between movable reservoir and fixed piston rod and that is reduced and enlarged by the adjusting movement of the servo motor, the pump chamber and thus oil is conveyed from the reservoir into the delivery line.
  • the power for conveying the leakage from the impeller is thereby applied by the servo motor in the adjusting movement of the impeller blades, it is therefore no separate drive mechanism for the leakage conveyor system needed.
  • the necessary anyway for the control of the turbine movement of the servo motor is thus used at the same time for promoting the leakage.
  • the leakage conveyor system is also structurally very simple and requires only a few parts and a small adaptations of the impeller.
  • a backflow of leakage into the collecting container can be particularly easily prevented if a valve is provided in the delivery line.
  • a particularly advantageous embodiment is obtained with a arranged in the turbine runner intermediate storage for extracted oil, in which promotes the feed line, the buffer advantageously between the piston rod, the impeller hub and a turbine shaft to which the turbine wheel is mounted, is arranged.
  • a second delivery line which is preferably arranged in the turbine shaft, is provided, one end of which is connected to the buffer.
  • a backflow of leakage from the buffer into the collecting container can be very easily prevented if the mouth of the first delivery line is arranged in the buffer such that the level of the leakage is below the mouth of the first delivery line.
  • Fig. 1 shows an impeller 1 of a Kaplan turbine, consisting of an impeller hub 2 which is fixed to a turbine shaft 4. On the impeller hub 2, a number of impeller blades 3 are arranged, which are adjustable via a hydraulic servomotor 5 and an actuating mechanism 6. Such wheels 1 are well known and it need not be discussed in detail.
  • the servo motor 5 is arranged on a piston rod 7, which is attached at one end to the impeller hub 2, and slides up and down on this, as indicated by the double arrow in FIG Fig. 1 indicated.
  • the servomotor 5 is supplied via supply lines 14 with pressurized hydraulic fluid, usually oil, and thus moved on the piston rod 7. Also, such a servo motor 5 is already well known and it is omitted to describe this in more detail.
  • seals 13 are arranged to prevent a Nachaußendringen of hydraulic fluid from the servo motor 5 in the interior of the impeller hub 2 and further from the impeller hub 2 in the medium flowing around the turbine.
  • seals 13 forcibly leakage losses, since the seals 13 can not be performed absolutely tight and wear and external influences the sealing performance of the seals 13 can also deteriorate. These leakage losses are to be absorbed for the reasons mentioned above and discharged from the impeller hub 2.
  • a leakage promotion according to the invention is used, as in the following with reference to Fig. 1 to 3 described.
  • an outwardly sealed collection container 8 is arranged, which is fixedly connected to the servo motor 5.
  • the collecting container 8 is consequently moved together with the servomotor 5.
  • the collecting container 8 is dimensioned and arranged so that it encloses the seals 13 on the side of the servomotor 5 which is connected to the collecting container 8. Any leakage losses of this seal 13 thus reach directly into the collecting container 8 and are collected there, as indicated by the arrow in FIG Fig. 2 indicated.
  • Possible leakage losses of the seal 13 on the other side of the servo motor 5 are collected by a suitable device, such as a ring on the piston rod 7, and passed via a line 10 into the collecting container 8, as also indicated by an arrow.
  • the line 10 is arranged here in the piston rod 7, but could of course be designed differently. This ensures that any leakage losses of hydraulic fluid are collected in the reservoir 8 and can not get into the interior of the impeller hub 2.
  • a connecting piece 16 is arranged, the mouth in the corner of the collecting container 8 in which the Leakage 15 accumulates is arranged.
  • This connection piece 16 is connected to a first delivery line 11, with which the leakage 15 can be removed from the collecting container 8.
  • the delivery line 11 is arranged here in the piston rod 7, but could of course also be designed or arranged as desired.
  • the connecting piece 16 is designed so that it can join the movement of the collecting container 8.
  • the connecting piece 16 is designed as a tube that is slidably disposed in a bore connected to the first conveying line 11.
  • the connector 16 could also be designed differently, such as a telescopic tube, as an elastic hose or as a spiral hose.
  • a check valve By a further valve between the pumping volume 17 and the air-filled interior of the impeller hub 2 could be prevented by pressure equalization, for example, that in the pumping chamber 17, an excessive negative pressure.
  • Fig. 1 and 3 a particularly advantageous embodiment is shown how the leakage 15 can be removed from the sump 8 and from the impeller hub 2.
  • the first delivery line 11 opens into a arranged between the turbine shaft 4, impeller hub 2 and piston rod 7 intermediate memory 9, in which the funded from the reservoir 8 leakage 18, indicated by the arrow, by the centrifugal forces acting again in the corner and the side walls of the cache 9 accumulates.
  • a further connecting piece 19 which is again arranged so that it opens in the region of the corner of the buffer 9, the leakage 18 passes through the pumping movement of the collecting container 8 in a second delivery line 12.
  • This second delivery line 12 passes the leakage 18 here through the Turbine shaft 4 out of the impeller hub 2, indicated by the arrow, eg in a supply tank for hydraulic fluid, not shown.
  • the first delivery line 11 is extended to just below the upper edge of the buffer 9. A backflow of leakage 18 in the first delivery line 11 would therefore only be possible if the buffer 9 would be almost completely filled. However, the same effect could in turn be achieved by a check valve arranged in the first delivery line 11 or the second delivery line 12.
  • Fig. 1 to 3 shows a multi-stage leakage conveying system that is particularly simple design and yet effective and safe working and that uses the performance of the already existing servo motor 5 in the adjustment movement of the impeller blades 3 for promoting the leakage.
  • the leak delivery system could also be designed in one stage only.
  • a vertical Kaplan turbine is shown.
  • the above-described leakage conveyor system works equally well with horizontal or inclined Kaplan turbines, such as in tube turbines, in which cases possibly the connecting pieces 16, 19 and / or the conveyor lines 11, 12 and / or the buffer 9 and / or other parts of the Leakage conveyor system could be arranged differently.

Abstract

Due to increasing environmental requirements, oil must be prevented from leaking from a turbine rotor disk and reaching the medium circulating around the turbine. In Kaplan turbines comprising a hydraulic mechanism (6) for actuating the rotor disk blades (3), hydraulic liquid leaks from the servomotor (5) and is collected in the inner chamber of the rotor disk hub (2). The invention relates to a rotor disk (1) by which means said leakage liquid can be reliably and easily collected and guided out of the rotor disk (1). A collecting basin (8) is arranged-around the free end of the piston rod (7). The actuating movement of the servomotor (5) reduces and enlarges the pump volume (17), and hydraulic liquid is thus guided from the collecting basin (8) into the delivery pipe (11).

Description

Die gegenständliche Erfindung betrifft ein Turbinenlaufrad vom Kaplan Typ mit verstellbaren Laufradschaufeln, wobei die Laufradschaufeln durch einen ölbetriebenen, auf einer Kolbenstange innerhalb der Laufradnabe angeordneten Servomotor verstellbar sind. Ein Turbinenlaufrad gemäß des Oberbegriffs des Anspruchs 1 ist aus DE 1 772 000 bekannt. Beim Verwenden ölbetriebener Servomotoren zum Verstellen der Laufradschaufeln kommt es auch zu Leckageverlusten von Servoöl aus dem Servomotor. Aufgrund steigender Umweltauflagen, muss verhindert werden, dass die Leckageverluste von Servoöl in das die Turbine umströmende Medium gelangt.The subject invention relates to a Kaplan type turbine impeller with adjustable impeller blades, wherein the impeller blades are adjustable by an oil operated servomotor disposed on a piston rod within the impeller hub. A turbine runner according to the preamble of claim 1 is made DE 1 772 000 known. Using oil-driven servomotors to adjust the impeller blades also results in leakage losses of servo oil from the servomotor. Due to increasing environmental regulations, it must be prevented that the leakage losses of servo oil get into the medium flowing around the turbine.

Der gegenständlichen Erfindung liegt folglich die Aufgabe zugrunde, ein Turbinenlaufrad anzugeben mit dem in einfacher und effektiver Weise verhindert wird, dass Leckage aus dem Servomotor in das die Turbine umströmende Medium austreten kann.The present invention is therefore an object of the invention to provide a turbine wheel with which is prevented in a simple and effective manner that leakage from the servo motor can escape into the medium flowing around the turbine.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass ein Sammelbehälter vorgesehen ist, in dem das zwischen der Kolbenstange und einer Dichtung des Servomotors austretende Öl aufgefangen wird, der Sammelbehälter um das freie Ende der Kolbenstange angeordnet und starr mit dem Servomotor verbunden ist und mit diesem mitbewegt wird, eine Förderleitung vorgesehen ist und ein Ende dieser Förderleitung in einem zwischen bewegbaren Sammelbehälter und feststehender Kolbenstange gebildeten Pumpraum mündet und dass durch die Stellbewegung des Servomotors der Pumpraum verkleinert und vergrößert wird und somit Öl vom Sammelbehälter in die Förderleitung gefördert wird.This object is achieved in that a collecting container is provided in which the oil emerging between the piston rod and a seal of the servomotor is collected, the collecting container is arranged around the free end of the piston rod and rigidly connected to the servo motor and is moved with this , A delivery line is provided and one end of this delivery line opens into a pump chamber formed between movable reservoir and fixed piston rod and that is reduced and enlarged by the adjusting movement of the servo motor, the pump chamber and thus oil is conveyed from the reservoir into the delivery line.

Die Leistung zum Fördern der Leckage aus dem Laufrad wird dadurch vom Servomotor bei der Stellbewegung der Laufradschaufeln aufgebracht, es wird daher kein eigener Antriebsmechanismus für das Leckagefördersystem benötigt. Die für die Regelung der Turbine ohnehin notwendige Bewegung des Servomotors wird damit gleichzeitig auch zum Fördern der Leckage verwendet. Darüber hinaus ist das Leckagefördersystem auch noch konstruktiv sehr einfach aufgebaut und benötigt nur wenige Teile und eine geringe Adaptionen des Laufrades.The power for conveying the leakage from the impeller is thereby applied by the servo motor in the adjusting movement of the impeller blades, it is therefore no separate drive mechanism for the leakage conveyor system needed. The necessary anyway for the control of the turbine movement of the servo motor is thus used at the same time for promoting the leakage. In addition, the leakage conveyor system is also structurally very simple and requires only a few parts and a small adaptations of the impeller.

Besonders einfach kann ein Rückströme von Leckage in den Sammelbehälter verhindert werden, wenn in der Förderleitung ein Ventil vorgesehen ist.A backflow of leakage into the collecting container can be particularly easily prevented if a valve is provided in the delivery line.

Eine besonders vorteilhafte Ausgestaltung erhält man mit einem im Turbinenlaufrad angeordneten Zwischenspeicher für gefördertes Öl, in dem die Förderleitung fördert, wobei der Zwischenspeicher vorteilhaft zwischen der Kolbenstange, der Laufradnabe und einer Turbinenwelle, an der das Turbinenlaufrad befestigt ist, angeordnet ist.A particularly advantageous embodiment is obtained with a arranged in the turbine runner intermediate storage for extracted oil, in which promotes the feed line, the buffer advantageously between the piston rod, the impeller hub and a turbine shaft to which the turbine wheel is mounted, is arranged.

Zur einfachen Förderung der Leckage aus dem Zwischenspeicher wird eine zweite Förderleitung, die vorzugsweise in der Turbinenwelle angeordnet ist, vorgesehen, deren ein Ende mit dem Zwischenspeicher verbunden ist.For easy promotion of leakage from the buffer a second delivery line, which is preferably arranged in the turbine shaft, is provided, one end of which is connected to the buffer.

Ein Rückströmen von Leckage aus dem Zwischenspeicher in den Sammelbehälter lässt sich sehr einfach unterbinden, wenn die Mündung der ersten Förderleitung derart im Zwischenspeicher angeordnet ist, dass das Niveau der Leckage unterhalb der Mündung der ersten Förderleitung liegt.A backflow of leakage from the buffer into the collecting container can be very easily prevented if the mouth of the first delivery line is arranged in the buffer such that the level of the leakage is below the mouth of the first delivery line.

Die vorliegende Erfindung wird im Nachfolgenden anhand der beispielhaften, nicht einschränkenden Figuren 1 bis 3 beschrieben. Dabei zeigt

  • Fig. 1 eine Schnittdarstellung eines Ausführungsbeispiel eines erfindungsgemäßen Laufrads,
  • Fig. 2 eine Detaildarstellung einer ersten Leckageförderstufe und
  • Fig. 3 eine Detaildarstellung einer zweiten Leckageförderstufe.
The present invention will now be described by way of example, not limitation FIGS. 1 to 3 described. It shows
  • Fig. 1 a sectional view of an embodiment of an impeller according to the invention,
  • Fig. 2 a detailed representation of a first leakage promotion stage and
  • Fig. 3 a detailed view of a second leakage conveyor stage.

Fig. 1 zeigt ein Laufrad 1 einer Kaplanturbine, bestehend aus einer Laufradnabe 2, die an einer Turbinenwelle 4 befestigt ist. An der Laufradnabe 2 sind eine Anzahl von Laufradschaufeln 3 angeordnet, die über einen hydraulischen Servomotor 5 und einem Betätigungsmechanismus 6 verstellbar sind. Solche Laufräder 1 sind hinlänglich bekannt und es muss nicht näher darauf eingegangen werden. Fig. 1 shows an impeller 1 of a Kaplan turbine, consisting of an impeller hub 2 which is fixed to a turbine shaft 4. On the impeller hub 2, a number of impeller blades 3 are arranged, which are adjustable via a hydraulic servomotor 5 and an actuating mechanism 6. Such wheels 1 are well known and it need not be discussed in detail.

Der Servomotor 5 ist an einer Kolbenstange 7, die an einem Ende an der Laufradnabe 2 befestigten ist, angeordnet und gleitet auf dieser auf und ab, wie durch den Doppelpfeil in Fig. 1 angedeutet. Dazu wird der Servomotor 5 über Zuleitungen 14 mit unter Druck stehender Hydraulikflüssigkeit, in der Regel Öl, versorgt und so auf der Kolbenstange 7 bewegt. Auch ein solcher Servomotor 5 ist bereits hinlänglich bekannt und es wird darauf verzichtet, diesen näher zu beschreiben.The servo motor 5 is arranged on a piston rod 7, which is attached at one end to the impeller hub 2, and slides up and down on this, as indicated by the double arrow in FIG Fig. 1 indicated. For this purpose, the servomotor 5 is supplied via supply lines 14 with pressurized hydraulic fluid, usually oil, and thus moved on the piston rod 7. Also, such a servo motor 5 is already well known and it is omitted to describe this in more detail.

Zwischen Servomotor 5 und Kolbenstange 7 sind Dichtungen 13 angeordnet, die ein Nachaußendringen von Hydraulikflüssigkeit aus dem Servomotor 5 in den Innenraum der Laufradnabe 2 und weiter aus der Laufradnabe 2 in das die Turbine umströmende Medium verhindern sollen. Allerdings kommt es bei den Dichtungen 13 zwangsweise zu Leckageverlusten, da die Dichtungen 13 nicht absolut dicht ausgeführt werden können und sich durch Verschleiß und äußeren Einflüssen die Dichtungsleistung der Dichtungen 13 ebenfalls verschlechtern kann. Diese Leckageverluste sind aus den oben genannten Gründen aufzufangen und aus der Laufradnabe 2 abzuführen. Dazu wird eine erfindungsgemäße Leckageförderung verwendet, wie im Nachfolgenden anhand der Fig. 1 bis 3 beschrieben.Between servo motor 5 and piston rod 7 seals 13 are arranged to prevent a Nachaußendringen of hydraulic fluid from the servo motor 5 in the interior of the impeller hub 2 and further from the impeller hub 2 in the medium flowing around the turbine. However, it comes with the seals 13 forcibly leakage losses, since the seals 13 can not be performed absolutely tight and wear and external influences the sealing performance of the seals 13 can also deteriorate. These leakage losses are to be absorbed for the reasons mentioned above and discharged from the impeller hub 2. For this purpose, a leakage promotion according to the invention is used, as in the following with reference to Fig. 1 to 3 described.

Um das freie Ende der Kolbenstange 7 wird ein nach außen abgeschlossener Sammelbehälter 8 angeordnet, der fest mit dem Servomotor 5 verbunden ist. Der Sammelbehälter 8 wird folglich mit dem Servomotor 5 mitbewegt. Der Sammelbehälter 8 ist dabei so dimensioniert und angeordnet, dass er die Dichtungen 13 auf der Seite des Servomotors 5 die mit dem Sammelbehälter 8 verbunden ist, umschließt. Eventuelle Leckageverluste dieser Dichtung 13 gelangen damit direkt in den Sammelbehälter 8 und werden dort gesammelt, wie durch den Pfeil in Fig. 2 angedeutet. Eventuelle Leckageverluste der Dichtung 13 auf der anderen Seite des Servomotors 5 werden durch eine geeignete Vorrichtung, z.B. ein Ring auf der Kolbenstange 7, aufgefangen und über eine Leitung 10 in den Sammelbehälter 8 geleitet, wie ebenfalls durch einen Pfeil angedeutet. Die Leitung 10 ist hier in der Kolbenstange 7 angeordnet, könnte aber natürlich beliebig anders ausgeführt sein. Damit wird sichergestellt, dass jegliche Leckageverluste von Hydraulikflüssigkeit im Sammelbehälter 8 aufgefangen werden und nicht in den Innenraum der Laufradnabe 2 gelangen können.To the free end of the piston rod 7, an outwardly sealed collection container 8 is arranged, which is fixedly connected to the servo motor 5. The collecting container 8 is consequently moved together with the servomotor 5. The collecting container 8 is dimensioned and arranged so that it encloses the seals 13 on the side of the servomotor 5 which is connected to the collecting container 8. Any leakage losses of this seal 13 thus reach directly into the collecting container 8 and are collected there, as indicated by the arrow in FIG Fig. 2 indicated. Possible leakage losses of the seal 13 on the other side of the servo motor 5 are collected by a suitable device, such as a ring on the piston rod 7, and passed via a line 10 into the collecting container 8, as also indicated by an arrow. The line 10 is arranged here in the piston rod 7, but could of course be designed differently. This ensures that any leakage losses of hydraulic fluid are collected in the reservoir 8 and can not get into the interior of the impeller hub 2.

Wie in Fig. 2 dargestellt sammelt sich die Leckage 15 durch die Rotation des Laufrades 1 wirkenden Fliehkräfte in den Ecken und Außenwänden des Sammelbehälters 8. Um es von dort wegfördern zu können, ist ein Anschlussstück 16 angeordnet, dessen Mündung im Bereich der Ecke des Sammelbehälters 8 in der sich die Leckage 15 ansammelt angeordnet ist. Dieses Anschlussstück 16 ist mit einer ersten Förderleitung 11 verbunden, mit der die Leckage 15 aus dem Sammelbehälter 8 abgeführt werden kann. Die Förderleitung 11 ist hier in der Kolbenstange 7 angeordnet, könnte aber natürlich auch beliebig anders ausgeführt oder angeordnet werden.As in Fig. 2 shown, the leakage accumulates 15 by the rotation of the impeller 1 acting centrifugal forces in the corners and outer walls of the sump 8. To be able to convey away from there, a connecting piece 16 is arranged, the mouth in the corner of the collecting container 8 in which the Leakage 15 accumulates is arranged. This connection piece 16 is connected to a first delivery line 11, with which the leakage 15 can be removed from the collecting container 8. The delivery line 11 is arranged here in the piston rod 7, but could of course also be designed or arranged as desired.

Durch die Stellbewegung des Servomotors 5, wodurch auch der Sammelbehälter 8 mitbewegt wird, kommt es zu einer Veränderung des zwischen der feststehenden Kolbenstange 7 und dem bewegten Sammelbehälter 8 eingeschlossenen Volumens, das hier als Pumpvolumen 17 bezeichnet wird. Der Bewegungsbereich des Servomotors 5 und damit auch des Sammelbehälters 8 ist in Fig. 1 mit H angedeutet. Bei sich verkleinerndem Pumpvolumen wird somit Leckage 15 in das Anschlussstück 16 und weiter in die erste Förderleitung 11 gefördert. Das Anschlussstück 16 ist dabei so ausgeführt, dass es die Bewegung des Sammelbehälters 8 mitmachen kann. Im Beispiel nach Fig. 2 ist das Anschlussstück 16 als Rohr ausgeführt, dass in einer mit der ersten Förderleitung 11 verbundenen Bohrung gleitend angeordnet ist. Selbstverständlich könnte das Anschlussstück 16 auch beliebig anders ausgeführt sein, wie z.B. als Teleskoprohr, als elastischer Schlauch oder als Spiralschlauch.By the adjusting movement of the servomotor 5, whereby the collecting container 8 is moved, there is a change in the volume enclosed between the fixed piston rod 7 and the moving collecting container 8, which is referred to here as pumping volume 17. The range of movement of the servomotor 5 and thus also of the collecting container 8 is in Fig. 1 with H indicated. With decreasing pumping volume, leakage 15 is thus conveyed into the connection piece 16 and further into the first delivery line 11. The connecting piece 16 is designed so that it can join the movement of the collecting container 8. In the example below Fig. 2 the connecting piece 16 is designed as a tube that is slidably disposed in a bore connected to the first conveying line 11. Of course, the connector 16 could also be designed differently, such as a telescopic tube, as an elastic hose or as a spiral hose.

Durch die erste Förderleitung 11 könnte die Leckage 15 aus der Laufradnabe 2, z.B. zu einem nicht dargestellten Auffangbehälter, weggefördert werden. Um zu verhindern, dass bei einer entgegengesetzten Stellbewegung des Servomotors 5, also bei sich vergrößerndem Pumpvolumen 17, Leckage 15 in den Sammelbehälter 8 zurückgesaugt wird, könnte z.B. in der Förderleitung 11 ein Rückschlagventil vorgesehen sein. Durch ein weiteres Ventil zwischen Pumpvolumen 17 und dem mit Luft gefüllten Innenraum der Laufradnabe 2 könnte durch Druckausgleich z.B. auch verhindert werden, dass im Pumpraum 17 ein zu großer Unterdruck entsteht.By the first delivery line 11, the leakage 15 from the impeller hub 2, for example, to a collecting container, not shown, be conveyed away. In order to prevent that in an opposite adjusting movement of the servo motor 5, so in the pump volume 17 magnifying, leakage 15 is sucked back into the collecting 8, could eg in the delivery line 11 may be provided a check valve. By a further valve between the pumping volume 17 and the air-filled interior of the impeller hub 2 could be prevented by pressure equalization, for example, that in the pumping chamber 17, an excessive negative pressure.

Durch die durch die Stellbewegung des Servomotors 5 bewirkte Pumpbewegung des Sammelbehälters 8 kann damit die Leckage 15 einfach und ohne zusätzliche Antriebseinrichtungen aus dem Sammelbehälter 8 entfernt werden.By caused by the adjusting movement of the servo motor 5 pumping movement of the collecting container 8 so that the leakage 15 can be removed easily and without additional drive means from the sump 8.

In Fig. 1 und 3 ist eine besonders vorteilhafte Ausgestaltung dargestellt, wie die Leckage 15 aus dem Sammelbehälter 8 und aus der Laufradnabe 2 entfernt werden kann.In Fig. 1 and 3 a particularly advantageous embodiment is shown how the leakage 15 can be removed from the sump 8 and from the impeller hub 2.

Die erste Förderleitung 11 mündet dabei in einem zwischen Turbinenwelle 4, Laufradnabe 2 und Kolbenstange 7 angeordneten Zwischenspeicher 9, in dem sich die aus dem Sammelbehälter 8 geförderte Leckage 18, angedeutet durch den Pfeil, durch die wirkenden Fliehkräfte wieder im Bereich der Ecke und der Seitenwände des Zwischenspeichers 9 ansammelt. Durch ein weiters Anschlussstück 19, das wieder so angeordnet ist, dass es im Bereich der Ecke des Zwischenspeichers 9 mündet, gelangt die Leckage 18 durch die Pumpbewegung des Sammelbehälters 8 in eine zweite Förderleitung 12. Diese zweite Förderleitung 12 leitet die Leckage 18 hier durch die Turbinenwelle 4 aus der Laufradnabe 2 heraus, angedeutet durch den Pfeil, z.B. in einen nicht dargestellten Versorgungsbehälter für Hydraulikflüssigkeit.The first delivery line 11 opens into a arranged between the turbine shaft 4, impeller hub 2 and piston rod 7 intermediate memory 9, in which the funded from the reservoir 8 leakage 18, indicated by the arrow, by the centrifugal forces acting again in the corner and the side walls of the cache 9 accumulates. By a further connecting piece 19, which is again arranged so that it opens in the region of the corner of the buffer 9, the leakage 18 passes through the pumping movement of the collecting container 8 in a second delivery line 12. This second delivery line 12 passes the leakage 18 here through the Turbine shaft 4 out of the impeller hub 2, indicated by the arrow, eg in a supply tank for hydraulic fluid, not shown.

Um ein Rücksaugen der Leckage 18 aus dem Zwischenspeicher 9 zu verhindern, ist die erste Förderleitung 11 bis knapp unterhalb der Oberkante des Zwischenspeichers 9 verlängert. Ein Rückfließen von Leckage 18 in die erste Förderleitung 11 wäre folglich nur dann möglich, wenn der Zwischenspeicher 9 fast zu Gänze gefüllt wäre. Die gleiche Wirkung könnte aber wiederum durch ein in der ersten Förderleitung 11 oder der zweiten Förderleitung 12 angeordnetes Rückschlagventil erzielt werden.In order to prevent the leak 18 from sucking back out of the buffer 9, the first delivery line 11 is extended to just below the upper edge of the buffer 9. A backflow of leakage 18 in the first delivery line 11 would therefore only be possible if the buffer 9 would be almost completely filled. However, the same effect could in turn be achieved by a check valve arranged in the first delivery line 11 or the second delivery line 12.

Durch das durch die Stellbewegung des Servomotors 5 zeitweise Saugen wird aber auch Leckage 18 aus der zweiten Förderleitung 12 zurück in den Zwischenspeicher 9 gesaugt. Dieser sollte daher zumindest so groß dimensioniert werden, dass er das gesamte Volumen der zweiten Förderleitung 12 aufnehmen kann, da dann durch die Verlängerung der ersten Förderleitung 11 ein Rücksaugen von Leckage 18 aus dem Zwischenspeicher 9 in die erste Förderleitung 11 verhindert werden kann. Aber es könnten natürlich ähnlich wie oben beschrieben auch in der zweiten Förderleitung 12 ein Rückschlagventil vorgesehen sein, um ein Rückfließen von Leckage 18 zu verhindern.By sucking by the adjusting movement of the servo motor 5 temporarily but also leakage 18 is sucked from the second feed line 12 back into the buffer 9. This should therefore be dimensioned at least so large that it can accommodate the entire volume of the second delivery line 12, since then can be prevented by the extension of the first delivery line 11 a return of leakage 18 from the buffer 9 in the first delivery line 11. But it could of course be similarly provided as described above in the second delivery line 12, a check valve to prevent backflow of leakage 18.

Das Ausführungsbeispiel nach Fig. 1 bis 3 zeigt somit ein mehrstufiges Leckageförderungssystem, dass besonders einfach aufgebaut und trotzdem wirkungsvoll und sicher arbeitet und dass für die Förderung der Leckage die Leistung des ohnehin vorhandenen Servomotors 5 bei der Stellbewegung der Laufradschaufeln 3 nutzt. Allerdings könnte das Leckageförderungssystem wie weiter oben beschrieben auch nur einstufig ausgeführt sein.The embodiment according to Fig. 1 to 3 Thus, shows a multi-stage leakage conveying system that is particularly simple design and yet effective and safe working and that uses the performance of the already existing servo motor 5 in the adjustment movement of the impeller blades 3 for promoting the leakage. However, as described above, the leak delivery system could also be designed in one stage only.

In den Fig. 1 bis 3 wird eine vertikal angeordnete Kaplanturbine gezeigt. Das oben beschriebene Leckagefördersystem funktioniert aber gleichermaßen auch bei horizontalen oder schräg angeordneten Kaplanturbinen, wie z.B. bei Rohrturbinen, wobei in diesen Fällen eventuell die Anschlussstücke 16, 19 und/oder die Förderleitungen 11, 12 und/oder der Zwischenspeicher 9 und/oder andere Teile des Leckagefördersystems anders angeordnet sein könnten.In the Fig. 1 to 3 a vertical Kaplan turbine is shown. However, the above-described leakage conveyor system works equally well with horizontal or inclined Kaplan turbines, such as in tube turbines, in which cases possibly the connecting pieces 16, 19 and / or the conveyor lines 11, 12 and / or the buffer 9 and / or other parts of the Leakage conveyor system could be arranged differently.

Claims (7)

  1. Turbine runner for a Kaplan-type turbine, with adjustable runner blades (3), where the runner blades (3) can be adjusted by means of a servo-motor (5) mounted on a piston rod (7) inside the runner hub (2), characterised by a collecting tank (8) being provided in which the hydraulic liquid emerging between the piston rod (7) and a seal (13) of the servo-motor (5) is collected, by the collecting tank (8) being arranged around the free end of the piston rod (7) and rigidly connected with the servo-motor (5), moving together with the servo-motor (5), by a delivery pipe (11) being provided and the end of this delivery pipe (11) leading into a pump volume (17) formed between the movable collecting tank (8) and the rigid piston rod (7) and by the actuating movement of the servo-motor (5) decreasing and increasing the pump volume (17) and thus hydraulic liquid being delivered from the collecting tank (8) into the delivery pipe (11).
  2. Turbine runner according to Claim 1, characterised by a valve, with which the back-flow of hydraulic liquid from the delivery pipe (11) to the collecting tank (8) can be prevented, being provided in the delivery pipe (11).
  3. Turbine runner according to Claim 1 or 2, characterised by an intermediate chamber (9) for the hydraulic liquid delivered being provided in the turbine runner (1) and the delivery pipe (11) delivering into this intermediate chamber (9).
  4. Turbine runner according to Claim 3, characterised by the intermediate chamber (9) being arranged between the piston rod (7), the runner hub (2) and a turbine shaft (4), to which the turbine runner (1) is attached.
  5. Turbine runner according to Claim 3 or 4, characterised by a second delivery pipe (12) being provided and one end of the second delivery pipe (12) being connected to the intermediate chamber (9).
  6. Turbine runner according to Claim 5, characterised by the second delivery pipe (12) being arranged in the turbine shaft (4).
  7. Turbine runner according to one of Claims 3 to 6, characterised by the outlet of the first delivery pipe (11) being arranged such in the intermediate chamber (9) that the level of the leakage (18) lies below the outlet of the first delivery pipe (11) and thus the back-flow of the hydraulic liquid from the intermediate chamber (9) to the first delivery pipe (11) is essentially prevented.
EP05752597A 2004-06-29 2005-06-06 Turbine rotor disk with reduced leakage of servo oil Not-in-force EP1769155B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0110204A AT414267B (en) 2004-06-29 2004-06-29 TURBINE WHEEL
PCT/EP2005/052580 WO2006000519A1 (en) 2004-06-29 2005-06-06 Turbine rotor disk with reduced leakage of servo oil

Publications (2)

Publication Number Publication Date
EP1769155A1 EP1769155A1 (en) 2007-04-04
EP1769155B1 true EP1769155B1 (en) 2008-03-19

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ID=34970261

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Application Number Title Priority Date Filing Date
EP05752597A Not-in-force EP1769155B1 (en) 2004-06-29 2005-06-06 Turbine rotor disk with reduced leakage of servo oil

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US (1) US8192164B2 (en)
EP (1) EP1769155B1 (en)
AT (2) AT414267B (en)
CA (1) CA2572183A1 (en)
DE (1) DE502005003355D1 (en)
ES (1) ES2303682T3 (en)
NO (1) NO20070465L (en)
PT (1) PT1769155E (en)
WO (1) WO2006000519A1 (en)

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Publication number Priority date Publication date Assignee Title
CN100422546C (en) * 2006-07-28 2008-10-01 四川东风电机厂有限公司 Medium-high speed large volume hydroelectric generating set thrust bearing
EP2756190A4 (en) * 2011-09-14 2015-05-13 Gen Electric System and method for collecting fluid leaking from a wind turbine component
DE102011085950A1 (en) * 2011-11-08 2013-05-08 Wobben Properties Gmbh Turbine for a hydroelectric power plant and hydropower plant
DE102012022583A1 (en) * 2012-11-20 2014-05-22 Voith Patent Gmbh Impeller of a Kaplan turbine
EP2908006A1 (en) * 2014-02-12 2015-08-19 Siemens Aktiengesellschaft Fluid collection arrangement
EP3193006B1 (en) * 2016-01-12 2019-05-15 GE Renewable Technologies Device for reversing a blade of a runner unit
CN105937476A (en) * 2016-06-08 2016-09-14 杭州江河水电科技有限公司 Environment-friendly rotating paddle type water turbine water lubricating rotating wheel

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GB568530A (en) * 1941-03-07 1945-04-10 English Electric Co Ltd Improved operating gear for adjustable propeller type blades in hydraulic turbines and pumps
US2636714A (en) * 1946-12-11 1953-04-28 Baldwin Lima Hamilton Corp Dewatering device for adjustable blade rotary hydraulic machines
DE1772000U (en) * 1953-10-07 1958-08-07 Voith Gmbh J M SERVOMOTOR ARRANGED IN THE IMPELLER HUB FOR ADJUSTING THE IMPELLER BLADES OF WATER TURBINES, PUMPS OD. DGL.
NL84649C (en) * 1953-10-26
US3778187A (en) * 1971-04-13 1973-12-11 Propulsion Systems Inc Controllable pitch propellers for marine vessels
SU473846A1 (en) * 1971-11-26 1975-06-14 Ленинградский Дважды Ордена Ленина Металлический Завод Им.Ххп Съезда Кпсс Hydraulic machine impeller
JPS5484147A (en) * 1977-12-19 1979-07-04 Toshiba Corp Kaplan turbine
JPS55114882A (en) * 1979-02-28 1980-09-04 Toshiba Corp Servo motor with movable vane
JPS5987279A (en) * 1982-11-10 1984-05-19 Hitachi Ltd Discharge device of leak oil in movable blade water turbine runner
SE506370C2 (en) * 1996-04-29 1997-12-08 Kvaerner Turbin Ab Sealing system for hydraulic machine

Also Published As

Publication number Publication date
ATA11022004A (en) 2006-01-15
CA2572183A1 (en) 2006-01-05
DE502005003355D1 (en) 2008-04-30
ATE389800T1 (en) 2008-04-15
WO2006000519A1 (en) 2006-01-05
US8192164B2 (en) 2012-06-05
NO20070465L (en) 2007-03-20
US20080095617A1 (en) 2008-04-24
ES2303682T3 (en) 2008-08-16
PT1769155E (en) 2008-06-30
AT414267B (en) 2006-10-15
EP1769155A1 (en) 2007-04-04

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